Excellent
My son loves it.
-19% · today
LEGO Arin's Battle Mech 71804
Lowest price now
€ 12,12
You save vs. RRP
−€ 2.87
−19%
Great time to buy The price is at or near its all-time low.
View at idee+spiel for €12.12Price details
Lowest ever
€ 12.12
RRP
€ 14.99
Average price
€ 14.28
Price per piece
€ 0.12
Release date
1 Jan 2024
1 / 8
ESC to close
Compare 1 retailers.
Retailer prices for 71804 are sorted by the lowest delivered price when shipping is known.
Retailer pricesPrices tracked across 10 retailers, updated twice a day.
If you buy through our links, we may earn a commission. This does not affect prices or ranking.
Full price history at a glance.
Lowest yet
€12.12
29 Aug 2026 · idee+spiel
Peak price
€21.50
29 Jun 2026 · Otto
Average
€14.28
5% below RRP
RRP
€14.99
reference price
Daily lowest price tracked across 2 retailers in Germany. The dotted line marks LEGO's recommended retail price.
Source: daily measurement at 2 retailers in Germany, 29 Jun 2026 – 22 Sep 2026. RRP via LEGO.com.
| Date | Price | Retailer | Stock |
|---|---|---|---|
| €12.12 | idee+spiel | In stock | |
| €12.12 | idee+spiel | In stock | |
| €12.12 | idee+spiel | In stock | |
| €12.12 | idee+spiel | In stock | |
| €12.12 | idee+spiel | In stock | |
| €12.12 | idee+spiel | In stock | |
| €12.12 | idee+spiel | In stock | |
| €12.12 | idee+spiel | In stock | |
| €12.12 | idee+spiel | In stock | |
| €12.12 | idee+spiel | In stock | |
| €12.12 | idee+spiel | In stock | |
| €12.12 | idee+spiel | In stock |
Price expectation
Price will likely hold steady.
28%
Low · ±6%
Low likelihood of further drops. Current price is near the all-time low.
Estimated price · next 3 months
| Date | Price | Type |
|---|---|---|
| 2026-06-29 | €21.50 | History |
| 2026-06-30 | €21.50 | History |
| 2026-07-01 | €21.50 | History |
| 2026-07-02 | €21.50 | History |
| 2026-07-03 | €21.50 | History |
| 2026-07-04 | €21.50 | History |
| 2026-08-29 | €12.12 | History |
| 2026-08-30 | €12.12 | History |
| 2026-09-04 | €12.12 | History |
| 2026-09-05 | €12.12 | History |
| 2026-09-07 | €12.12 | History |
| 2026-09-08 | €12.12 | History |
| 2026-09-09 | €12.12 | History |
| 2026-09-10 | €12.12 | History |
| 2026-09-11 | €12.12 | History |
| 2026-09-12 | €12.12 | History |
| 2026-09-13 | €12.12 | History |
| 2026-09-14 | €12.12 | History |
| 2026-09-15 | €12.12 | History |
| 2026-09-16 | €12.12 | History |
| 2026-09-17 | €12.12 | History |
| 2026-09-18 | €12.12 | History |
| 2026-09-19 | €12.12 | History |
| 2026-09-20 | €12.12 | History |
| 2026-09-21 | €12.12 | History |
| 2026-09-22 | €12.12 | History |
| 2026-10-22 | €12.20 | Forecast |
| 2026-11-21 | €12.28 | Forecast |
| 2026-12-21 | €12.36 | Forecast |
€14.99
RRP
€12.12
Lowest · 90 days
€21.50
Highest · 90 days
Stable
Trend
About this set
For LEGO Arin's Battle Mech (71804), we track 1 retailer in Germany, with 1 currently in stock. This set from the NINJAGO theme has 104 pieces, including 2 minifigures and was released in 2024. The current lowest price is €12.12 at idee+spiel, 19% below the RRP of €14.99. That works out to €0.12 per piece and a saving of €2.87 versus the RRP. The lowest price ever was €12.12 on 29 Aug 2026 at idee+spiel. The set is recommended for builders aged 4 and up. The current price is at or near that low, so this is a strong time to buy. Use price history and stock data to judge whether this is a good time to buy.
Dimensions
19.1 × 20.5 × 4.6 cm
Pieces
104
Age
4+
Explore more
Dive deeper into this set.
All about this set
Arin’s Battle Mech (71804) ninja toy lets kids aged 4+ learn to build as they join in with their ninja heroes’ attempt to save their dragon friends. This role-play action toy includes an impressive mech figure to inspire kids to recreate exciting adventures from season 2 of the NINJAGO® Dragons Rising TV show. This LEGO® set comes with 2 minifigures: Arin with a katana accessory and a Wolf Mask Warrior with a sword accessory. Arin fits in the posable mech figure, which wields a large sword and rotating blade, while the Wolf Mask Warrior can fly in a glider that has posable wings, a disc shooter and 2 spears. There’s also a brick-built crystal cave with a magic mallet inside and a weapons rack with 2 golden katana sword accessories. This ninja toy has been designed to provide a fun experience for children aged 4+ who are discovering the joy of building with LEGO bricks. The set comes with a Starter Brick: a partly constructed base that gets kids building quickly and with confidence.
This set is perfect for children aged 4 and up: easy to build thanks to the starter brick, but still exciting with the moving mech, large sword, and cool details like the rotating blade arm. The two minifigures (Arin and Wolf Mask Warrior) are beautifully designed and provide great opportunities for role-playing. A great gift for the price! This set is perfect for children aged 4 and up: easy to build thanks to the starter brick, but still exciting with the moving mech, large sword, and cool details like the rotating blade arm. The two minifigures (Arin and Wolf Mask Warrior) are beautifully designed and provide great opportunities for role-playing. A...
Reference
Set details
Set number
71804
Theme
NINJAGO
Subtheme
Dragons Rising Season 2
Year
2024
Pieces
104
Minifigures
2
Price per piece
€0.12
Age
4+
Dimensions
19.1 × 20.5 × 4.6 cm
RRP
€14.99
Parts inventory
104
pieces
Distinctive parts
-
Shield Round Bowed with Gold Dragon, Red Eyes, Fans print Part ID 75902pr0022
-
Tile Round 2 x 2 with Dragon Head, White Gear in Dark Azure Circle print Part ID 14769pr9988
-
Mech Leg, Right, with Black Pin Part ID 70943c01
Building instructions
Arin's Battle Mech instruction manual
Minifigures in Arin's Battle Mech.
2 minifigures according to this set's Rebrickable inventory.
Related sets NINJAGO.
Other sets from the same theme for price comparison.
Best LEGO Ninjago sets in 2026: dragons, mechs and 15th anniversary
Ninjago turns 15 and the anniversary line gives collectors a reason to buy now. For gift buyers the choice is simpler: dragon or mech, big or compact. Here is the trade-off.
Updated 10 July 2026 Read
LEGO NINJAGO Last Chance: five sets retiring soon
LEGO.com has five NINJAGO sets in the Dutch Last Chance to Buy list. This is the practical buying order for shoppers in the Netherlands.
Updated 18 May 2026 ReadFrequently asked questions
All about the Arin's Battle Mech.
What is the lowest price for Arin's Battle Mech?
The lowest current price we show is €12.12.
Has LEGO 71804 ever been cheaper?
The lowest historical price was €12.12 on 29 Aug 2026 at idee+spiel.
How many pieces does LEGO 71804 have?
This set has 104 pieces.
Which minifigures are included in LEGO 71804?
This set includes 2 minifigures, including Arin, Wolf Mask Warrior.
What year is this set from?
LEGO 71804 was released in 2024.
What is the RRP for LEGO 71804?
LEGO's recommended retail price is €14.99.
What is the recommended age for LEGO 71804?
LEGO recommends ages 4+ for this set.
Is LEGO 71804 still available?
Yes, this set is currently available at 1 retailer.
Which retailers do you compare?
We currently compare 1 retailer prices for this set.
How often do you update prices?
We check prices multiple times per day at every tracked retailer and publish the most recent value on this page.